Category:Redfone

Redfone is a T1/E1 PRI-to-Ethernet Bridge. It is an integrated black-box "appliance" designed to streamline installation and enable redundant design of open source telephony based VoIP systems such as Asterisk

I have used this product for High Availability Asterisk installations for automatic failover of the PRI ISDN lines.

Whatever you do; do not use the Redfone documentation on how to install this product. The documentation is so out dated that it is just going to confuse the hell out of you.